#!/usr/bin/env python

# Copyright 2012 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Error handler."""

import jinja2
import logging
import os

__author__ = 'Maciej Machulak'
__maintainer__ = 'Maciej Machulak'
__email__ = 'mmachulak@google.com'

__copyright__ = 'Copyright 2012, Google Inc.'
__license__ = 'Apache License 2.0'
__version__ = '0.2'
__status__ = 'Prototype'

jinja_environment = jinja2.Environment(
  loader=jinja2.FileSystemLoader(
    os.path.join(os.path.dirname(__file__),'templates/')))


def handle_error(self,
                 header='Error',
                 msg='here must have been an error. Please try again later...',
                 url='/',
                 url_name='main page',
                 template_file='error.html'):
  """Handles errors by displaing a page with specific values set."""

  logging.error(msg)
  logging.error(os.path.dirname(__file__))

  values = {
      'header': header,
      'msg': msg,
      'url': url,
      'url_name': url_name
  }
  template = jinja_environment.get_template(template_file)
  self.response.out.write(template.render(values))
